LINK ELECTRIC & SAFETY CONTROL COMPANY OmniLink 5000, Руководство по эксплуатации

Страница: 21 / 80

April 17, 2000 Man ual Versio n 1.0
3.8
Figure 3.11: Acceptable Locations for Mounting Cushion
Pressure Transducer.
Section 3.4.1 Cushion Pressure Transducer Mounting
The system uses a method of control in which the fill valve or dump valve is energized to raise or lower
the pressure of the system. The pressure transducer tells the system when it has reached the proper
pressure. Because air pressure drops occur across air lines when filling or dumping, proper placement of
the pressure transducer is very important for correct operation of the system. Possible pressure
transducer mounting locations from best to worst are (refer to Figure 3.11):
a) A spare port on the cushion surge tank.
b) The same port that the safety pop-off valve is mounted on if it has its own port on the surge tank.
c) Right at the outlet on the surge tank that goes to the cushion.
d) Right at the inlet on the surge tank from the Fill/Dump valves.
e) If there is no surge tank the pressure transducer should be mounted right at the inlet on the
cushion.
Section 3.4.2 Cushion Air Valve System Mounting
The mounting location of the cushion air valve system is not critical. Consideration should be given,
however, to ease of maintenance, plumbing, and wiring when choosing the mounting location. Also
note that sometimes the check valve in the original system may be up at the surge tank itself. The check
valve
must be removed for the automatic system to work.
Section 3.4.3 Cushion System Wiring
Refer to Appendix B, Figure B.2, for typical wiring of the cushion valve and pressure transducer. Note
that the auto-select connection is only connected if a type “C” integrated valve is used. For type “A”
and “B” valves, the auto-select connection from pin 2 of the cushion module is not required. If your